/Engine/Source/Runtime/SlateCore/Public/Layout/WidgetPath.h
[TOptional](API\Runtime\Core\IO\TOptional)< [FArrangedWidget](API\Runtime\SlateCore\Layout\FArrangedWidget) > FindArrangedWidget ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > WidgetToFind ) const